/*
 * This source file is part of DVGEditor.
 *
 * Copyright (c) Pavel Shchelkun 2012 DVGEditor
 * <http://code.google.com/p/dataviewer/>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#ifndef EDITORVIEW_H
#define EDITORVIEW_H

#include <QGraphicsView>

class EditorView : public QGraphicsView
{
    Q_OBJECT

public:
    enum RendererType { Native, OpenGL, Image };

    EditorView(QGraphicsScene *scene, QWidget *parent = 0);

    void drawBackground(QPainter *p, const QRectF &rect);
    void loadBackgroundImage(const QString& file);
    void createBackgroundImage(int width, int height, const QColor& color);
    bool isExistGraphicsItem(QGraphicsItem *item);

    void setRenderer(RendererType type = Native);
    
signals:
    
public slots:
    void setHighQualityAntialiasing(bool highQualityAntialiasing);
    void setViewBackground(bool enable);
    void setViewOutline(bool enable);

protected:
    void wheelEvent(QWheelEvent *event);
    void paintEvent(QPaintEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void resizeEvent(QResizeEvent *event);

private:
    RendererType       m_renderer;
    QImage             m_image;

    QGraphicsItem     *m_documentItem;
    QGraphicsRectItem *m_backgroundItem;
    QGraphicsRectItem *m_outlineItem;

    bool    m_LeftMouseButtonPressed;
    bool    m_HandMode;

    QPoint  m_LastLButtonPressedPoint;


protected:
    //Holds the current centerpoint for the view, used for panning and zooming
    QPointF CurrentCenterPoint;
    //From panning the view
    QPoint LastPanPoint;
    //Set the current centerpoint in the
    void SetCenter(const QPointF& centerPoint);
    QPointF GetCenter() { return CurrentCenterPoint; }

public:
    void setHandMode(bool hand);
};

#endif // EDITORVIEW_H
